| 光折变全息CO2激光局域热固定 |
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| 引用本文： | 刘波,徐良瑛.光折变全息CO2激光局域热固定[J].光学学报,1998,18(5):56-561. |
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| 作者姓名： | 刘波 徐良瑛 |
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| 作者单位： | 中国科学院上海光学精密机械研究所，中国科学院上海硅酸盐研究所 |
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| 摘 要： | 提出用ＣＯ２激光对记录于ＬｉＮｂＯ３晶体中的全息进行实时实时地局域热固定，通过脉冲加热和加载吸热体，可以使得温度范围在１００～２００℃之间的区域接近于加热光的形状，分布于一局部范围，文中给出了加热模型及其数值解，通过得到了最优解参数进行了一系列实验，实验结果显示，用ＣＯ２激光可以成功地光折变全息进行实时地地局域热固定，并且加热时间短，固定转换效率较高。
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| 关 键 词： | 光折变 体全息 热固定 光存储 二氧化碳激光 |
| 收稿时间： | 1997/5/6 |
Local Thermal Fixing of Photorefractive LiNbO 3 Hologram by CO 2 Laser |
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| Liu Bo,Liu Liren.Local Thermal Fixing of Photorefractive LiNbO 3 Hologram by CO 2 Laser[J].Acta Optica Sinica,1998,18(5):56-561. |
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| Authors: | Liu Bo Liu Liren |
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| Abstract: | An real time and in situ fixing method by heating with a CO 2 laser beam is suggested to thermally fix a small local hologram in a bulk of Fe:LiNbO 3 photorefractive crystal. To form a heating up to 100￣200℃ volume with the shape similar to the heat transfer equations, different heating modes with or without metal absorbers for heat guiding by using a continuos or pulsed laser beam are analyzed. The optimal mode may be the case of pulsed heating with absorbers. On this basis, experiments are designed and demonstrated. It is shown that the fixing process by CO 2 laser beam is very short compared with the process by oven, and the fixing efficiency is high. |
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| Keywords: | photorefractive volume hologram thermal fixing CO 2 laser |
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